Brake



- May '21, 1935. P. E. HALL 2,002,006

I BRAKE Filed sept. 5, 1932 56 52 v /Z'\1 '1 1 l8 6 ax/75mm:

74 ,4 E3 7a arr 51mm:

IN V EN TOR.

PERCY EDGAR HALL fi7 m I A TTORNEY brakes of Patented May 21, 1 655 1 I-QN T-ED S England. aa-

Application. September a, 1932, Serial No. 631,688 r In Great Britain September 4, 1931 This invention relates to brakes and more particularly to controls for operating brakes for the landing wheels of aircraft.

It is highly desirable that controls for the the landing wheels of aircraft be operated from the rudder bar,

equally or unequally to facilitate manoeuvring of the aircraft on the ground, and also that the brakes may be applied by hand and retained in applied position when the airplane is stationary.

An object of the invention is to provide brake controls for fulfilling these requirements in a very simple and effective manner, and which may be readily applied to aircraft of various types and designs. 4

Other objects of the invention will appear from landing wheels of an airplane are adapted to be applied by mechanical means from levers rock able on a stationary shaft, and thelevers are arranged to be moved independently by pneumatic means controlled through pedals on a rudder bar, or to be moved simultaneously by means of a hand lever, both brakes being applied with the same force when the hand lever is operated.

In a preferred arrangement, a stationary shaft III is supported by suitable brackets i2 which may be secured to the floor boards of an airplane, not shown. The shaft has sleeved thereon spaced levers l4 and I6 connected respectively through cables l8 and 20 to the respective brakes associated with the wheels of an airplane, only one of which is shown at conventional type.

22. The brakes may be of any the shaft l0 between the levers l4 and Ilia a lever 26 provided with a pick-up dog 24 connecting rock these The lever 26 is connected through a and Ii to tion only. cable 28 to a hand nxed supp 2,

it with the levers ll levers in a clockwise direcoperated lever 20 pivoted on a and associated with the hand operated lever is a ratchet segment 24 adaptable for cooperation with so that the lever ment.

when the hand a pawl carried by the .lever,

may be locked against moveoperated lever is rocked to in pose tension on the cable 28, the lever 26 is rocked in a clockwise direction, and this movement rocks the levers II and it which through the cables or tension members I! and 20 effectively actuates the brakes.

One of the brackets l2 supports two operating cylinders 28 and 40 connected respectively by pipe lines 42 and M to valves 40 and 48 on a compressed air reservoir 50. The operating cylinders have pistons 52 and 54 provided with rods 58 and 58 attached by over-running connections 60 to the levers l4 and I6 to rock these levers in one direction only, to tension the cables I! and 20 for actuation of the brakes. V

The operating cylinders 28 and 40 are connected through valves 46 and .48 to the compressed air reservoir and these valves are adaptable for actuation simultaneously or independently by levers 62 and 64 connected through cables 66 and I to suitable levers I0 and 12 arranged on rudder pedals ll and 16 on the respective ends of a rudder bar 18 of the conventional type.

By actuating the levers i0 and 12 on the pedals i4 and IS the brakes may be applied independently or simultaneously, or they may be applied with the same or with different force by movement of the levers on the pedals. 7

It is, of course, understood that when the plane is stationary, both brakes will normally be applied through the hand lever, and should there be a failure of the pneumatic system at any time, the brakes can of course be applied by means of the hand lever when the plane is in motion on the ground.

.Although this invention has been described in connection with certain specific embodiments, the principles involved are susceptible of numerous other applications readily occurring to persons skilled inthe art. The invention is, therefore, to be limited only as indicated by the scope of the appended claims.

Having thus described the various features of the invention what I claim as new and desire to secure by Letters Patent is:

1. A control mechanism for airplanes comprising a rudder bar, a compressed air reservoir having a pair of valves,members connecting the respective ends of the rudder bar to the respective valves for actuation from the rudder bar, operating cylinders connected to the reservoir through the valves, a rock shaft, levers pivoted on the rock shaft and connected to the pistons of the operating cylinders, a pair of brakes, tension members connecting the levers to the brakes. and mechanical means for rocking the shaft to actuate the tension members to apply the brakes simultaneously.

2. A control mechanism for airplanes comprising a rudder bar, a compressed air reservoir having valves, members connecting the respective ends of the rudder bar to the respective ends of the respective valves, operating cylinders connected to the reservoir through the valves, 9. rock shaft, levers pivoted thereonand connected to the pistons of the operating cylinders, a pair of brakes, tension members connecting the. levers to brakes, and mechanical means for rocking the shaft to actuate the tension members and apply the brakes simultaneously.

3. A control mechanism for airplanes comprising a rudder bar, a compressed air reservoir having a pair of valves, means connecting the respective ends of the rudder bar to the respective valves for independent or simultaneous actuation, a pair or operating cylinders connected to the reservoir through the valves, a rock shaft, spaced levers pivoted thereon, means connecting the respective levers to the pistons or the operating cylinders, a pair of brakes, means connecting the brakes to the levers and mechanical means for rocking the shaft to actuate the levers and apply the brakes simultaneously.

. PERCY EDGAR HALL. 

